Rating Adjustment for Settlement of Cutthroat Flumes
Publication: Journal of Irrigation and Drainage Engineering
Volume 124, Issue 6
Abstract
A study was performed to examine the effects of flume settlement on the accuracy of discharge measurements, using the cutthroat flume in a free-flowing condition. A series of 111 tests was performed on 10.2 cm × 0.91 m, 30.5 cm × 1.37 m, and 61 cm × 1.37 m flumes. Each cutthroat flume was systematically adjusted to simulate settlement in the lateral, longitudinal, and combined lateral-longitudinal directions. Discharge inaccuracies were recorded for each settlement condition. Flume discharge measurement errors ranged from ±3% to ±23% for lateral, longitudinal, and combined lateral-longitudinal slopes of up to 4%. The greatest errors occurred when the lateral slope and/or the longitudinal slope reached or exceeded 3%. An algorithm was developed to adjust the flow measurements for settlement. A procedure was devised for determining the true flow measurement to within ±3% for free-flowing conditions.
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Information & Authors
Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 124 • Issue 6 • November 1998
Pages: 311 - 315
Copyright
Copyright © 1998 American Society of Civil Engineers.
History
Published online: Nov 1, 1998
Published in print: Nov 1998
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